(x²-2y)(xy²)³怎么算
[-xy/(x-y)²]²×(y²-xy/x)³
先化简,再求值:{xy(x²-3y)+3xy²}(-2xy)+x³y²(2x-y
x³y-2x²y²+xy³
2x+2y/x-y与(x+y)²/xy 怎么通分
x-y/x²÷x²-2xy+y²/xy*(xy-x²)
-2y³+(3xy²-x²y)-2(xy²-y³)
x²-2xy+y²分之x²+2xy-3y³如何因式分解
因式分解(xy-1)²+(x+y-2)(x+y-2y)怎么做哇?
因式分解:(x+y)³+2xy-2x²y-2xy²-1
计算:(-7x²y)(2x²y-3xy³+xy)
计算:x²+2xy+y²/xy-y².x²-2xy+y²/xy+y
计算:-2x²y(-2xy²)²+(2xy)³·(xy²)